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2003 Ford Taurus Quiet Engine, won't idle, back compression?

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May 18, 2018, 12:44 PM

Post #1 of 2 (355 views)
2003 Ford Taurus Quiet Engine, won't idle, back compression? Sign In

I had a melted EGR Feedback sensor. Changed it, melted the second one. Decided to change the EGR valve. Good call, it was clogged with a half inch of soot/whatever in the tube leading up to it. With new EGR valve and new sensor the car runs with very low RPM and will stall rather easily. The engine also sounds muffled, quieter than normal. If I take the hoses off of the EGR Feedback Sensor I can rev the engine to 2k, but it runs poorly and will stall easily but not as easily as with the hoses connected. The hoses and the EGR Feedback Sensor do not seem to be getting very hot like they were before I changed the EGR valve and removed the clog. I feel the danger of melting has been solved by removing the clog to the EGR valve. But what is this new problem? (the very quiet sounding motor that will not rev up and stalls easily)

(This post was edited by yuckfoo on May 18, 2018, 1:22 PM)

Ultimate Carjunky / Moderator
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May 18, 2018, 1:40 PM

Post #2 of 2 (342 views)
Re: 2003 Ford Taurus Quiet Engine, won't idle, back compression? Sign In

You probably have a plugged up catalyst(s) or exhaust system. The excessive back pressure is burning up your DPFE hoses and sensor and making your engine run poorly.

If you do find your catalyst is plugged up or melted, you need to figure out why. Misfiring and contamination by oil and coolant are killers of cats.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on May 18, 2018, 1:43 PM)

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